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Use After Free

CVE-2020-21688

High
8.8/10

Summary

A heap-use-after-free in the "av_freep" function in libavutil/mem.c of FFmpeg prior to 2.8.19, 3.x prior to 3.2.17, 3.3.x prior to 3.4.10, 3.5-dev, 4.x prior to 4.1.9, 4.2.x prior to 4.2.6, 4.3.x prior to 4.3.3, 4.4-dev allows attackers to execute arbitrary code.

  • LOW
  • NETWORK
  • HIGH
  • UNCHANGED
  • REQUIRED
  • NONE
  • HIGH
  • HIGH

CWE-416 - Use After Free

Use-after-free (UaF) vulnerability occurs when the application is using a pointer to memory that has been freed. Any attempt to read/write to a buffer after it is de-allocated allows memory corruption, sensitive information exposure, and can potentially lead to arbitrary code execution.

References

Advisory Timeline

  • Published